There are ten levels of mental method, namely, no pomelo legend, one breath, pure yuan, two instrument centripetal, three flowers gathering at the top, four levels of returning to truth, five gases facing the yuan, six rivers returning to one, seven spirits transforming, eight famine shattered, nine turns of reincarnation, and the true dragon and god guard. Each level needs different mental force, and the added attributes are also different. After each advanced level, you can put the mouse on the word advanced to view the attributes of the lower level.